CN213235548U - Electronic water pump, shell assembly thereof and vehicle with electronic water pump - Google Patents

Abstract

The utility model discloses an electronic water pump, a shell assembly thereof and a vehicle with the electronic water pump, wherein the shell assembly of the electronic water pump comprises a shell, a shaft base and a rotating shaft, the shell comprises a bottom wall, and the bottom wall is provided with a mounting hole; at least part of the shaft base is matched in the mounting hole and is formed by integral injection molding with the shell, the cross section of the shaft base has a non-circular peripheral outline, and the shaft base is provided with a first hole extending along the axial direction of the shell; one end of the rotating shaft in the axial direction is matched in the first hole to connect the rotating shaft and the shaft base. The utility model discloses electronic pump's casing subassembly has reduced electronic pump at the vibration range of operation in-process, has prolonged electronic pump's life.

Description

Electronic water pump, shell assembly thereof and vehicle with electronic water pump

Technical Field

The utility model relates to a water pump technical field specifically, relates to an electronic pump's casing subassembly, have this casing subassembly electronic pump and have this electronic pump's vehicle.

Background

The electronic water pump is widely applied due to the advantages of accurate control and high efficiency.

In the related art, a housing of an electronic water pump is directly injection-molded on an outer circumference of one end of a rotating shaft. However, the material of the rotating shaft is metal, the material of the shell is nonmetal, the elastic modulus difference between the two materials is large, and the vibration amplitude of the electronic water pump in the operation process is large.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

Therefore, the embodiment of an aspect of the present invention provides a casing assembly of an electronic water pump, which reduces the vibration amplitude of the electronic water pump during operation and prolongs the service life of the electronic water pump.

An embodiment of another aspect of the present invention provides an electronic water pump having the casing assembly.

An embodiment of another aspect of the present invention provides a vehicle having the electronic water pump.

A housing assembly according to an embodiment of the first aspect of the present invention comprises a housing comprising a bottom wall having a mounting hole; a shaft base at least partially fitted within the mounting hole and formed integrally with the housing by injection molding, the shaft base having a cross-section with a non-circular peripheral profile and a first hole extending in an axial direction of the housing; and one end of the rotating shaft in the axial direction is matched in the first hole to connect the rotating shaft and the shaft base.

According to the utility model discloses electronic water pump's casing subassembly, through axle base connection pivot and casing, and the integrative formation of moulding plastics of axle base and casing, the cross section of axle base has non-circular shape periphery profile, avoided the direct injection moulding of pivot and casing so that metal structure spare and non-metal structure spare direct contact and the little problem of area of contact, reduced electronic water pump at the vibration range of operation in-process, and the difficult rotation of pivot and drop, prolonged casing subassembly and electronic water pump's life.

In some embodiments, the shaft base includes a body, the first hole is formed in the body, and the body is provided with at least one position-limiting portion spaced apart from the first hole, and the position-limiting portion is configured to prevent relative rotation between the shaft base and the housing.

In some embodiments, the plurality of limiting portions are arranged at intervals along the circumferential direction of the shaft base at the periphery of the first hole.

In some embodiments, the body includes a first end surface and a second end surface which are oppositely arranged in a longitudinal direction of the shaft base, the second end surface of the body is connected to the bottom wall, the first end surface of the body is spaced apart from the bottom wall in an axial direction of the housing, the stopper portion is a notch which extends from the first end surface of the body toward the second end surface of the body, and the notch extends from an outer peripheral surface of the body toward a longitudinal center line of the body.

In some embodiments, the second end surface of the body is provided with one protrusion or recess, or the second end surface of the body is provided with a plurality of protrusions or recesses arranged at intervals in the circumferential direction of the shaft base at the outer periphery of the first hole.

In some embodiments, the outer circumferential profile of the cross-section of the body is circular.

In some embodiments, the shaft base includes a base body having one end surface connected to the bottom wall, and a boss protruding outward from the other end surface of the base body, and an outer end surface of the boss is spaced apart from the bottom wall in an axial direction of the housing, and on a projection plane orthogonal to a longitudinal direction of the shaft base, a peripheral contour of the base body is circular, a peripheral contour of the boss is non-circular, and at least a portion of the peripheral contour of the boss is located within the peripheral contour of the base body.

In some embodiments, the projection plane orthogonal to the longitudinal direction of the shaft base comprises at least one straight edge, and the straight edge is located within the outer peripheral contour of the base body.

In some embodiments, on a projection plane orthogonal to the longitudinal direction of the shaft base, the boss further includes a plurality of arc-shaped sides, and adjacent straight sides are connected by the arc-shaped sides.

In some embodiments, on a projection plane orthogonal to the longitudinal direction of the shaft base, the straight sides are multiple, and the multiple straight sides are connected in sequence.

In some embodiments, a portion of the shaft base fits within the mounting hole, another portion of the shaft base is located outside the mounting hole, and a distance between an end surface of the another portion of the shaft base distal from the mounting hole and an end surface of the bottom wall at the mounting hole is 0.4 mm to 0.6 mm.

In some embodiments, an end surface of the first end of the shaft is substantially flush with an inner end surface of a portion of the shaft base.

In some embodiments, the spindle and the spindle base are press-fit.

According to the utility model discloses an electronic water pump of the embodiment of second aspect includes the casing subassembly of any one of above-mentioned embodiments.

According to the utility model discloses an electronic water pump, its casing subassembly has reduced the vibration range of electronic water pump in the operation process, and the difficult rotation of pivot and drop, has prolonged casing subassembly and electronic water pump's life.

The vehicle according to the embodiment of the third aspect of the present invention includes the electronic water pump according to the above embodiment.

According to the utility model discloses a vehicle, casing subassembly among its electronic water pump can reduce the vibration range of electronic water pump at the operation in-process, and the difficult rotation of pivot and drop, has prolonged casing subassembly and electronic water pump's life, and then has improved the vehicle performance.

Drawings

Fig. 1 is a schematic sectional structure view of a housing assembly of an electronic water pump according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a housing assembly of an electronic water pump according to an embodiment of the present invention.

Fig. 3 is a schematic view of an exemplary construction of the shaft mount of the housing assembly of fig. 1.

Fig. 4 is another exemplary structural schematic of the shaft mount of the housing assembly of fig. 1.

Fig. 5 is a schematic view of yet another exemplary construction of the shaft mount of the housing assembly of fig. 1.

Fig. 6 is a schematic view of a further exemplary construction of the shaft mount of the housing assembly of fig. 1.

Fig. 7 is a further exemplary structural schematic view of the shaft mount of the housing assembly of fig. 1.

Fig. 8 is a schematic view of an exemplary structure of a housing of the housing assembly of fig. 1.

Reference numerals:

the stator assembly comprises a shell 11, a first accommodating cavity 1101, a second accommodating cavity 1102, a third accommodating cavity 1103, a bottom wall 111, an annular groove 112, a top wall 113, an inner peripheral wall 114, an outer peripheral wall 115, a mounting hole 12, a shaft base 13, a body 131, a base body 132, a boss 133, a first hole 14, a rotating shaft 15, a limiting portion 16, a convex portion 17, a stator assembly 18 and a concave portion 19.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-2, the housing assembly of the electronic water pump according to the embodiment of the present invention includes a housing 11, a shaft base 13, and a rotating shaft 15.

The housing 11 includes a bottom wall 111, and the bottom wall 111 has a mounting hole 12. As shown in fig. 1, a mounting hole 12 is provided on an upper end surface of the bottom wall 111 of the housing 11, and the mounting hole 12 extends downward into the bottom wall 111 along the upper end surface of the bottom wall 111.

At least part of the shaft base 13 is fitted in the mounting hole 12. As shown in fig. 1, the lower end surface and at least a part of the outer peripheral surface of the shaft base 13 are provided in the mounting hole 12. The shaft base 13 is integrally injection-molded with the housing 11. In other words, the shaft base 13 is integral with the housing 11. Specifically, the injection molding material is introduced into a corresponding injection mold to form the shaft base 13 and the housing 11 by injection molding. It can be understood, according to the utility model discloses electronic water pump has twice the process of moulding plastics in the manufacturing process, and once the process of moulding plastics is the formation stator injection moulding body of moulding plastics with cladding stator module spare, and the process of moulding plastics twice is with casing 11 and axle base 13 injection moulding one-piece in order to clad stator injection moulding body.

The shaft base 13 has a non-circular outer peripheral profile in cross section, and as shown in fig. 2, the shaft base 13 has a first hole 14 extending in the axial direction (the up-down direction in fig. 1) of the housing 11. Specifically, as shown in fig. 1, the first hole 14 penetrates the shaft base 13 in the up-down direction.

One end of the rotary shaft 15 in the axial direction thereof (the lower end of the rotary shaft 15 in fig. 1) is fitted in the first hole 14 to connect the rotary shaft 15 with the shaft base 13. Wherein the rotation shaft 15 and the shaft base 13 cannot rotate relatively, and specifically, the rotation shaft 15 is in interference fit with the first hole 14 to prevent the rotation between the rotation shaft 15 and the shaft base 13; the rotating shaft 15 is welded or other fastening connection with the shaft base 13 to prevent rotation therebetween. It will be appreciated that the shaft mount 13 is used to mount the shaft 15 to connect the shaft 15 to the bottom wall 111 of the housing 11.

Specifically, as shown in fig. 8, the housing 11 is formed by injection molding and includes a first accommodating cavity 1101, a second accommodating cavity 1102 and a third accommodating cavity 1103, the first accommodating cavity 1101 is adapted to accommodate a stator assembly 18 of the electronic water pump and surrounds the outside of the second accommodating cavity 1102, the second accommodating cavity 1102 is adapted to accommodate a rotor assembly (not shown) of the electronic water pump, a rotating shaft 15 is disposed through the rotor assembly, a lower end of the rotating shaft 15 is fitted in the first hole 14 of the shaft base 13, and the third accommodating cavity 1103 is adapted to accommodate a controller (not shown) of the electronic water pump. The second accommodating cavity 1102 is located at the center of the housing 11, the second accommodating cavity 1102 extends in the vertical direction, the first accommodating cavity 1101 is annularly arranged on the periphery of the second accommodating cavity 1102 and extends in the same direction as the second accommodating cavity 1102, and the second accommodating cavity 1102 and the first accommodating cavity 1101 are spaced apart in the radial direction of the housing 11. Thereby, the layout of the first and second accommodation cavities 1101 and 1102 may be made suitable for the assembly of the stator assembly 18 and the rotor assembly.

Further, a third receiving chamber 1103 is formed at a lower interval of the second receiving chamber 1102, the second receiving chamber 1102 is opened toward an upper side to facilitate assembly of the rotor assembly, and the third receiving chamber 1103 is opened toward a lower side to facilitate assembly of the controller.

The housing 11 includes a bottom wall 111, and the housing 11 further includes a top wall 113, an inner circumferential wall 114, and an outer circumferential wall 115. The top wall 113 is spaced apart from the bottom wall 111 in the up-down direction, the top wall 113 is located above the bottom wall 111, the inner peripheral wall 114 is spaced apart from the outer peripheral wall 115 in the radial direction of the housing 11, the outer peripheral wall 115 is circumferentially provided on the outer periphery of the inner peripheral wall 114, the inner peripheral wall 114 is located above the bottom wall 111, the lower end of the inner peripheral wall 114 is connected to the upper side surface of the bottom wall 111, the outer peripheral surface of the bottom wall 111 is connected to the inner peripheral surface of the outer peripheral wall 115, a portion of the outer peripheral wall 115 is located above the bottom wall 111, and another.

The bottom wall 111 separates the first accommodating cavity 1101 from the third accommodating cavity 1103 and the second accommodating cavity 1102 from the third accommodating cavity 1103, the annular first accommodating cavity 1101 is formed between the top wall 113, the inner peripheral wall 114, the bottom wall 111 and a part of the outer peripheral wall 115 located above the bottom wall 111, the second accommodating cavity 1102 opening towards the upper side is formed between the inner peripheral wall 114 and the bottom wall 111, and the third accommodating cavity 1103 opening towards the lower side is formed between the bottom wall 111 and a part of the outer peripheral wall 115 located below the bottom wall 111. From this, casing 11 simple structure holds the chamber rationally distributed, makes things convenient for injection moulding process's implementation, is favorable to improving the effect of moulding plastics.

According to the utility model discloses electronic water pump's casing subassembly is through axle base connection pivot and casing, and the integrative formation of moulding plastics of axle base and casing, and the cross section of axle base has non-circular shape periphery profile, has avoided the direct injection moulding of pivot and casing so that metallic structure spare and non-metallic structure spare direct contact and the little problem of area of contact, and the difficult rotation of pivot and drop have prolonged casing subassembly and electronic water pump's life.

The utility model discloses electronic water pump's casing subassembly once moulds plastics the stator injection molding body and forms, again with casing subassembly secondary injection moulding, realize the self sealss effect with the rotor, saved the separation sleeve between stator module and rotor air gap, reduced casing subassembly's material cost, simplified electronic water pump's assembly process simultaneously to make stator module's rigidity promote, be favorable to electronic water pump noise's improvement, improved electronic water pump operation's reliability.

In some embodiments, the bottom wall 111 is provided with an annular groove 112. The lower surface of the bottom wall 111 and the first accommodating chamber 1101 are opposite to each other in the vertical direction, the portion opposite to the second accommodating chamber 1102 in the vertical direction is a first portion, the annular groove 112 is formed in the first portion and is recessed upward, and a gap is formed between the bottom wall surface of the annular groove 112 and the lower surface of the first accommodating chamber 1101.

It should be noted that, in this embodiment, the pouring gate may be reasonably arranged according to the arrangement position of the annular groove 112, so that when the filling material flows to the outer periphery of the first accommodating chamber 1101, the filling material is adapted to flow through the gap between the bottom wall of the annular groove 112 and the lower side surface of the first accommodating chamber 1101. Preferably, the pouring gate is provided at the second portion and at the center of the second portion.

In the conventional design of the electronic water pump, when the wall thickness of a part of a shell formed between a first accommodating cavity and a second accommodating cavity is small in injection molding, the air gap of the motor is small, the motor efficiency is high, but because the gap between the first accommodating cavity and the second accommodating cavity is small, the gap has large resistance to the flow of materials in the gap during injection molding, so that the problem that the materials are easy to be insufficiently filled is caused, and in addition, because the flow speed of the materials in the gap between the first accommodating cavity and the second accommodating cavity is small, the filling time is long, the materials are finally easy to collect in the gap and form weld marks, so that the strength of the shell is reduced.

According to the utility model discloses the casing, through set up the ring channel on the diapire, can utilize the ring channel and the first clearance that holds between the chamber downside, to the first filling material that holds the chamber periphery of flow direction carrying out the throttle, thereby make the filling material preferentially fill in the first clearance space that holds between chamber and the second hold the chamber, both can avoid the material to hold the first clearance intussuseption that holds between chamber and the second and fill badly, can avoid forming the weld mark in this clearance space again, and then improve the intensity of casing and the performance of electronic water pump.

According to the utility model discloses electronic water pump sets up the integrative injection moulding of casing and stator module, through set up the ring channel on the diapire of casing, can avoid the casing local to fill badly, can avoid forming the weld mark on the internal perisporium again, and then improve the intensity of casing and the performance of electronic water pump.

In some embodiments, the shaft base 13 includes a body 131, the first hole 14 is disposed on the body 131, at least one position-limiting portion 16 is disposed on the body 131 and spaced apart from the first hole 14, and the position-limiting portion 16 is used for preventing relative rotation between the shaft base 13 and the housing 11.

As shown in fig. 3 to 7, the first hole 14 is a circular hole, the outer peripheral profile of the cross section of the body 131 is circular, the first hole 14 penetrates the body 131 in the axial direction of the shaft base 13, and the axis of the first hole 14 is on the same straight line with the axis of the body 131. The body 131 includes an upper side and a lower side, an upper side of the position-limiting portion 16 is connected to the upper side of the body 131, and a lower side of the position-limiting portion 16 is connected to an outer circumferential surface of the body 131.

In some embodiments, as shown in fig. 6 and 7, the stopper portion 16 is plural, and the plural stopper portions 16 are arranged at intervals in the circumferential direction of the shaft base 13 at the outer periphery of the first hole 14.

The utility model discloses electronic pump's casing subassembly directly moulds plastics through setting up axle base 13 and casing 11 and forms, and a plurality of spacing 16 at least part links to each other with casing 11 for axle base 13 at least part wraps up in casing 11 with the form of moulding plastics.

In some embodiments, the body 131 includes a first end surface (e.g., an upper side surface of the body 131 in fig. 1) and a second end surface (e.g., a lower side surface of the body 131 in fig. 1) oppositely arranged in a longitudinal direction of the shaft base 13, the second end surface of the body 131 is connected to the bottom wall 111, the first end surface of the body 131 is spaced apart from the bottom wall 111 in an axial direction of the housing 11, the stopper portion 16 is a notch extending from the first end surface of the body 131 toward the second end surface of the body 131, and the notch extends from an outer circumferential surface of the body 131 toward a longitudinal center line of the body 131.

As shown in fig. 1, the lower side of the body 131 is connected to the upper side of the bottom wall 111, and the lower side of the body 131 is spaced apart from the upper side of the bottom wall 111. As shown in fig. 3 to 7, the stopper 16 is a notch extending from the upper side of the body 131 to the lower side of the body 131, and the notch extends from the inside of the body 131 to the outer peripheral surface of the body 131. The body 131 includes a third side and a fourth side outside the upper side and the lower side, the fourth side is parallel to the upper side and the lower side and is located between the upper side and the lower side in the up-down direction, the third side connects the fourth side and the upper side, and the third side is perpendicular to the fourth side. Wherein the third side and the fourth side enclose a gap.

In some embodiments, the second end surface of the body 131 is provided with one protrusion 17 or recess 19, or the second end surface of the body 131 is provided with a plurality of protrusions 17 or recesses 19, and the plurality of protrusions 17 or recesses 19 are arranged at intervals in the circumferential direction of the shaft base 13 at the outer periphery of the first hole 14.

As shown in fig. 3, the lower side surface of the body 131 is provided with a plurality of protrusions 17, the plurality of protrusions 17 are arranged at intervals along the circumferential direction of the lower side surface of the body 131, and the protrusions 17 are used for matching with the recesses on the housing 11.

As shown in fig. 4, the body 131 is provided with a plurality of recesses 19, the plurality of recesses 19 being arranged at intervals along the circumferential direction of the lower side surface of the body 131, the recesses 19 being for fitting with the projections on the housing 11.

In some embodiments, the shaft base 13 includes a base 132 and a boss 133, one end surface of the base 132 (e.g., a lower side surface of the base 132 in fig. 3 to 7) is connected to the bottom wall 111, the boss 133 protrudes outward from the other end surface of the base 132 (e.g., an upper side surface of the base 132 in fig. 3 to 7), an outer end surface of the boss 133 (e.g., an upper side surface of the boss 133 in fig. 3 to 7) is spaced apart from the bottom wall 111 in the axial direction of the housing 11, the outer circumferential profile of the base 132 is circular, the outer circumferential profile of the boss 133 is non-circular in a projection plane orthogonal to the longitudinal direction of the shaft base 13, and at least a portion of the outer circumferential profile of the boss 133 is located within the outer circumferential profile of the base 132.

As shown in fig. 3 to 7, the shaft base 13 includes a base 132 and a projection 133, a lower side surface of the base 132 is connected to the bottom wall 111, an upper side surface of the base 132 is connected to a lower side surface of the projection 133, a projection of the base 132 is circular on a projection plane orthogonal to a longitudinal direction of the shaft base 13, and a projection of the projection 133 is circumscribed to the circular projection of the base 132, whereby an area of the projection plane of the projection 133 is smaller than an area of the projection plane of the base 132. It is understood that the base 132 and the boss 133 described in the present embodiment are portions of the body 131 without the notch in the previous embodiment.

In some embodiments, the boss 133 includes at least one straight edge on a projection plane orthogonal to the longitudinal direction of the shaft base 13, and the straight edge is located within the outer peripheral contour of the base 132.

In some embodiments, on a projection plane orthogonal to the longitudinal direction of the shaft base 13, there are a plurality of straight sides, and the plurality of straight sides are connected in sequence.

In some embodiments, the boss 133 further includes a plurality of arc-shaped sides on a projection plane orthogonal to the longitudinal direction of the shaft base 13, and adjacent straight sides are connected by the arc-shaped sides.

As shown in fig. 3 to 7, the outer circumferential profiles of the bosses 133 are D-shaped, diamond-shaped, and oval, respectively, and the bosses 133 corresponding to the D-shaped, diamond-shaped, and oval outer circumferential profiles include 1 straight side, 4 straight sides, and 2 straight sides, respectively.

It will be appreciated that the present application is not limited to the projection plane orthogonal to the longitudinal direction of the axle base 13, the boss 133 comprising the form of a straight edge. For example, the position corresponding to the straight edge may also be in other forms such as a curved section.

In some embodiments, a portion of the shaft base 13 fits within the mounting hole 12, another portion of the shaft base 13 is located outside the mounting hole 12, and a distance between an end surface of the another portion of the shaft base 13 away from the mounting hole 12 (an upper end surface of the shaft base 13 in fig. 1) and an end surface of the bottom wall 111 at the mounting hole 12 (an upper side surface of the bottom wall 111 in fig. 1) is 0.4 mm to 0.6 mm.

As shown in fig. 1, a rotor assembly (not shown) is disposed outside the rotating shaft 15, a protrusion for magnetizing and positioning the magnetic steel is disposed at a lower end of the rotor assembly, and the upper end surface of the shaft base 13 and the upper end surface of the bottom wall 111 are spaced by the above distance, so that friction between the instantaneous protrusion and the bottom wall of the electronic water pump from a standing state to an operating state can be avoided, and the service life and performance of the electronic water pump are improved.

Preferably, the distance between the upper end surface of the shaft base 13 and the upper end surface of the bottom wall 111 is 0.5 mm. As shown in fig. 1, the thickness of the shaft base 13 in the vertical direction is a, the depth of the mounting hole 12 in the vertical direction is B, and a-B is 0.5mm, so that the upper end surface of the directly injection-molded shaft base 13 has no burr or burr.

In some embodiments, an end surface of the first end of the shaft 15 (the lower end surface of the shaft 15 in fig. 1) is substantially flush with an inner end surface of a portion of the shaft base 13 (the cross-section of the shaft base 13 in fig. 1).

In some embodiments, the shaft 15 is press fit with the shaft base 13. As shown in fig. 1, the shaft base 13 is tightly fitted and connected to the lower end of the rotating shaft 15 by press riveting.

Some specific example electronic water pump housing assemblies according to the present invention are described below with reference to fig. 1-5.

As shown in fig. 1 to 5, the housing assembly of the electronic water pump according to the embodiment of the present invention includes a housing 11, a shaft base 13, and a rotating shaft 15.

The housing 11 includes a bottom wall 111, the bottom wall 111 is provided with a mounting hole 12, and the mounting hole 12 extends downward into the bottom wall 111 along an upper end surface of the bottom wall 111.

The shaft base 13 is installed in the installation hole 12 and is integrally injection-molded with the housing 11. The shaft base 13 includes a base 132 and a boss 133, a lower end surface of the base 132 is connected to the bottom wall 111, the boss 133 extends upward from an upper end surface of the base 132 and protrudes beyond an upper end surface of the bottom wall 111, and a distance between the upper end surface of the boss 133 and the upper end surface of the bottom wall 111 is 0.5 mm. The first hole 14 extends downward from the upper end surface of the boss 133 and to the lower end surface of the base 132.

The outer peripheral profile of the cross-section of the base 132 is generally circular and the outer peripheral profile of the cross-section of the boss 133 is non-circular. On a projection plane orthogonal to the vertical direction, the projection plane area of the boss 133 is smaller than the projection plane area of the base 132. Specifically, the outer peripheral profile of the cross section of the boss 133 is substantially D-shaped, and on a projection plane orthogonal to the up-down direction, the boss 133 includes 1 straight edge and one arc edge, one end of the arc edge is connected to one end of the straight edge, and the other end of the arc edge is connected to the other end of the straight edge.

The rotating shaft 15 includes an upper end and a lower end, the lower end of the rotating shaft 15 is inserted into the first hole 14 to be matched with the shaft base 13, and the rotating shaft 15 is in interference fit with the first hole 14.

Other exemplary electronic water pump housing assemblies according to the present invention are described below with reference to fig. 1 and 6.

As shown in fig. 1 and 6, the housing assembly of the electronic water pump includes a housing 11, a shaft base 13, and a rotation shaft 15.

The outer peripheral profile of the cross section of the boss 133 is square, and on a projection plane orthogonal to the up-down direction, the boss 133 includes 4 straight sides connected in sequence.

The other structure of the housing assembly shown in fig. 6 may be the same as the embodiment shown in fig. 2-5 and will not be described in detail herein.

Still other exemplary electronic water pump housing assemblies according to the present invention are described below with reference to fig. 1 and 7.

As shown in fig. 1 and 7, the housing assembly of the electronic water pump includes a housing 11, a shaft base 13, and a rotation shaft 15.

On a projection plane orthogonal to the up-down direction, the boss 133 includes 2 straight sides arranged oppositely and two arc sides arranged oppositely, one end of one arc side is connected with one end of one straight side, and the other end of the one arc side is connected with one end of the other straight side; one end of the other arc-shaped edge is connected with the other end of the straight edge, and the other end of the other arc-shaped edge is connected with the other end of the other straight edge.

The other structure of the housing assembly shown in fig. 7 may be the same as the embodiment shown in fig. 2-5 and will not be described in detail herein.

In some specific examples, the shaft base 13 further includes a plurality of protrusions 17 or a plurality of recesses 19.

For example, as shown in fig. 3, the shaft base 13 includes a plurality of protrusions 17, the plurality of protrusions 17 are provided on the lower end surface of the base 132 and are spaced apart along the circumferential direction of the base 132, and correspondingly, the base 111 is provided with a recess, and the protrusions 17 on the bottom surface of the shaft base 13 are used for matching with the recess on the base 111.

For example, as shown in fig. 4, the shaft base 13 includes a plurality of recesses 19, the plurality of recesses 19 are provided on the lower end surface of the base 132 and are spaced apart along the circumferential direction of the base 132, and correspondingly, the base 111 is provided with recesses, and the recesses 19 on the bottom surface of the shaft base 13 are used for matching with the protrusions on the bottom wall 111.

The utility model discloses do not adopt pivot and the direct injection moulding of casing among the casing subassembly, can effectively avoid metallic structure spare and non-metallic structure spare direct contact for metallic structure spare and non-metallic structure spare's area of contact reduces.

The utility model discloses casing subassembly axis base and the integrative injection moulding of casing, axle base internal diameter is pressed with the pivot excircle and is riveted the tight fit and be connected, when the water pump operation, rotor subassembly direct action in pivot, the pivot acts on the axle base, the axle base acts on the casing, the direct injection moulding of axle base and casing, axle base and casing area of contact are big, effectively avoid the pivot at the inside easy problem of rotating and droing of casing, improve electronic water pump's life.

According to the utility model discloses electronic water pump, include according to the utility model discloses electronic water pump's casing subassembly.

According to the utility model discloses an electronic water pump, its casing subassembly has reduced the vibration range of electronic water pump in the operation process, and the difficult rotation of pivot and drop, has prolonged casing subassembly and electronic water pump's life.

According to the utility model discloses a vehicle includes the electronic water pump of above-mentioned embodiment. The vehicle can be a new energy vehicle, a fuel vehicle and the like, wherein the new energy vehicle comprises a pure electric vehicle, an extended range electric vehicle, a hybrid electric vehicle, a fuel cell electric vehicle, a hydrogen engine vehicle and the like.

According to the utility model discloses a vehicle, casing subassembly among its electronic water pump can reduce the vibration range of electronic water pump at the operation in-process, and the difficult rotation of pivot and drop, has prolonged casing subassembly and electronic water pump's life, and then has improved the vehicle performance.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (15)

1. A housing assembly for an electronic water pump, comprising:

a housing including a bottom wall having a mounting hole;

a shaft base at least partially fitted within the mounting hole and formed integrally with the housing by injection molding, the shaft base having a cross-section with a non-circular peripheral profile and a first hole extending in an axial direction of the housing;

and one end of the rotating shaft in the axial direction is matched in the first hole to connect the rotating shaft and the shaft base.

2. The electronic pump housing assembly of claim 1, wherein the shaft base includes a body, the first hole is formed in the body, the body is provided with at least one limiting portion spaced apart from the first hole, and the limiting portion is configured to prevent relative rotation between the shaft base and the housing.

3. The housing assembly of an electronic water pump according to claim 2, wherein the plurality of limiting portions are arranged at intervals along a circumferential direction of the shaft base at an outer periphery of the first hole.

4. The housing assembly of an electronic water pump according to claim 2, wherein the body includes a first end surface and a second end surface that are opposite to each other in a longitudinal direction of the shaft base, the second end surface of the body is connected to the bottom wall, the first end surface of the body is spaced apart from the bottom wall in an axial direction of the housing, the stopper is a notch that extends from the first end surface of the body toward the second end surface of the body, and the notch extends from an outer peripheral surface of the body toward a longitudinal center line of the body.

5. The housing assembly of an electronic water pump according to claim 4, wherein the second end surface of the body is provided with one protrusion or recess, or the second end surface of the body is provided with a plurality of protrusions or recesses, and the plurality of protrusions or recesses are arranged at intervals along the circumferential direction of the shaft base at the periphery of the first hole.

6. The housing assembly of an electronic water pump of claim 2, wherein a cross-sectional outer circumferential profile of the body is circular.

7. The housing assembly of an electronic water pump according to claim 1, wherein the shaft base includes a base body having one end surface connected to the bottom wall, and a boss protruding outward from the other end surface of the base body, and an outer end surface of the boss is spaced apart from the bottom wall in an axial direction of the housing, and on a projection plane orthogonal to a longitudinal direction of the shaft base, a peripheral contour of the base body is circular, a peripheral contour of the boss is non-circular, and at least a part of the peripheral contour of the boss is located within the peripheral contour of the base body.

8. The housing assembly of an electronic water pump according to claim 7, wherein the projection includes at least one straight edge on a projection plane orthogonal to a longitudinal direction of the shaft base, and the straight edge is located within an outer peripheral contour of the base.

9. The housing assembly of an electronic pump according to claim 8, wherein the projection further includes a plurality of arcuate edges on a projection plane orthogonal to a longitudinal direction of the shaft base, and adjacent ones of the plurality of arcuate edges are connected by the arcuate edges.

10. The housing assembly of an electronic water pump according to claim 8, wherein the straight sides are arranged in a plurality on a projection plane orthogonal to a longitudinal direction of the shaft base, and the straight sides are sequentially connected.

11. The housing assembly of an electronic water pump according to any one of claims 1 to 10, wherein a portion of the shaft base fits within the mounting hole, another portion of the shaft base is located outside the mounting hole, and a distance between an end surface of the another portion of the shaft base that is away from the mounting hole and an end surface of the bottom wall at the mounting hole is 0.4 mm to 0.6 mm.

12. The housing assembly of an electronic water pump of claim 11, wherein an end surface of the first end of the shaft is substantially flush with an inner end surface of a portion of the shaft base.

13. The housing assembly of an electronic pump according to claim 11, wherein the shaft and the shaft base are press fit.

14. An electronic water pump, comprising the housing assembly of the electronic water pump as claimed in any one of claims 1 to 13.

15. A vehicle characterized by comprising the electronic water pump according to claim 14.

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